Showing papers on "Magnesium peroxide published in 2013"

Oxidative breakers in a silicone based suspension

Abstract: An oxidative breaker system for use in reducing the viscosity of a polysaccharide-based or derivatized polysaccharide-based suspension includes a silicone carrier fluid, an oxidizer, and a suspension aid. The suspension aid is preferably fumed silica. The oxidizer may be selected from the group consisting of alkali metal peroxide, transition metal peroxide, persulfate compound, bromide compound, and bromate compound. In highly preferred embodiments, the oxidizer is magnesium peroxide or calcium peroxide. Alternative carrier fluids and suspension agents are also included in the art. Also disclosed is a method for breaking a polysaccharide -based suspension with the inventive oxidative breaker system.

Effect of magnesium peroxide biostimulation of fish feed-loaded marine sediments on changes in the bacterial community.

Abstract: The effect of an oxygen-releasing compound (ORC) magnesium peroxide (MgO(2)) on the changes in the bacterial community in organically polluted sediment of aquaculture farms was tested in a microcosm experiment. The sediment, to which fish feed was added, was treated with 1% or 5% MgO(2). The addition of fish feed induced a highly reduced environment with low redox potential, high total sulfides, and abundance of sulfate-reducing bacteria (SRB) . Although the sediment remained highly reduced at 1% MgO(2), there was a significant reduction of total sulfides, increase of redox potential, and resultant reduction of SRB. The bacterial community clearly changed with the treatments according to denaturing gradient gel electrophoresis (DGGE) analysis of 16S ribosomal RNA gene (16S rDNA) . Aerobes disappeared in the fish feed-added sediment, and some SRB emerged in place of these aerobes. On the other hand, the SRB disappeared in the ORC-amended sediment due to its highly oxic condition. This study revealed the bacterial community in the sediments was affected mainly by the redox potential and resultant sulfides produced by SRB, but total organic carbon and nitrogen were not determinants of the microbial population.

Preparation method for nano magnesium peroxide

Abstract: The invention relates to a preparation method for nano magnesium peroxide. Using magnesium oxide, ammonium chloride, and oxydol with mass percentage of 30% according to the mass ratio of 1:(1.5-2.5):(30-40); dissolving the magnesium oxide into deionized water and grinding into magnesium oxide size mixture with the mass percentage of 3-4%; dissolving the ammonium chloride into the oxydol, and stirring and slowly adding into the ground magnesium oxide size mixture; keeping the reaction under the continuous stirring at 500 r/min for 3-4 h to obtain white precipitate mixed solution; filtering the white precipitate mixed solution to obtain a wet filter cake; performing freezing vacuum drying at -80 DEG C to obtain a target product of nano magnesium peroxide powder with particle size of 20 nm, good dispersity, and purity higher than 50%. The method is simple to operate and is suitable for large-scaled industrialized production.

Dual function internal breaker for crosslinked hydroxyethylcellulose

Abstract: Treatment fluids for use in a well, the treatment fluids including: (a) water; (b) hydroxyalkylcellulose, wherein the hydroxyalkylcellulose is hydrated in the water-based continuous phase; (c) a crosslinker for the hydroxyalkylcellulose; (d) magnesium peroxide in particulate form; and (e) a transition metal containing complex having at least one organic ligand. Methods of treating a treatment zone in a well, the methods comprising: (A) forming a treatment fluid according to the disclosure; and (B) introducing the treatment fluid into a well.